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EGT Readings Change when Transmitting

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ChangDriver

Joined: 15 Sep 2007
Posts: 266

Posted: Sun Jul 17, 2011 3:58 am Post subject: EGT Readings Change when Transmitting

Bob:



I have noticed an odd thing happening on my digital EGT display.  When I key the microphone to transmit on the Garmin SL-30, the graphical EGT display bars are driven down to zero.  I short key of the mic and they go down a little....hold it keyed and they go to zero.



Any suggestions on what to look for/do?



Craig

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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Jul 17, 2011 6:55 am Post subject: EGT Readings Change when Transmitting

At 06:58 AM 7/17/2011, you wrote:

 	  Quote: 	
		  



Bob:



I have noticed an odd thing happening on my digital EGT 

display.  When I key the microphone to transmit on the Garmin SL-30, 

the graphical EGT display bars are driven down to zero.  I short key 

of the mic and they go down a little....hold it keyed and they go to zero.



Any suggestions on what to look for/do?


	


    In all likelihood this is a manifestation

    of poor design in EGT gauge's electro-

    magnetic compatibility. Since you know

    the condition exists and does not represent

    a hazard to flight or even an operational

    inconvenience, I'd ignore it.



   Bob . . .

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keithward1(at)bellsouth.n
Guest

Posted: Sun Jul 17, 2011 12:08 pm Post subject: EGT Readings Change when Transmitting

Craig,



I had an issue with my EFIS that sounds similar to yours.  When I keyed the mike, most of my readouts (vsi, heading, etc.) moved.  I changed the BNC connectors and the problem was solved.  I think I did a poor job installing the original connectors.  



Not sure if this would fix your issue, but it may be worth a try.  



Keith



On Jul 17, 2011, at 7:58 AM, "ChangDriver" <capav8r(at)gmail.com> wrote:



 	  Quote: 	
		   

 

 Bob:

 

 I have noticed an odd thing happening on my digital EGT display.  When I key the microphone to transmit on the Garmin SL-30, the graphical EGT display bars are driven down to zero.  I short key of the mic and they go down a little....hold it keyed and they go to zero.

 

 Any suggestions on what to look for/do?

 

 Craig

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=346751#346751

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